Machine for molding artificial stone.



Patented Mar. Il, i902. N. F. PALMER.

(Appncatifm med sept. 2s. 1901,

` 2 Sheets-5heet I.

MACHINE FOR HOLDING ARTIFICIAL STUNE. y

(No Modem A Patented Mar. II, 1902, N. F.,PALMEB. MACHIHEFDR HOLDING ARTIFICIAL STVNE.

(Application mea septn 28.1901.)

(no modem' 2 Sheets Shet 2.

UNITED STATES- PATENT @risica NOYES F. PALMER, OF BROO-KLYN, NEW? YORK.

MACHINE FOR MOLDING ARTlFlClAL'STONE.

SPECIFICATION forming part of Letters Patent No. 694,985, dated. March 1 l, 1902.

A l Application led September 28, 1901. Serial No. 76,852. (No model.)

To LZZ when@ it 11i/ty concern,.-

Be it known that I, NOYES F. PALMER, a citizen of the United States, and a resident of Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Machines for Molding Artificial Stone, of which the followingis a specilication. 1

This invention relates to a machine for molding hollow and solid concrete building and paving blocks.

The machine is provided with a mold-box having sliding sides and. ends that are simultaneously moved inward or outward. The mechanism for edecting this movement is such that the machine may be readily set to mold blocks of various sizes.

In the accompanying drawings, Figure l is a side velevation of my improved machine; Fig. 2, an end elevation thereof; Fig. 3, a

plan; Fig. 4, a perspective view showing ad- Fig. 8, a section through the mold on line S 8,Y

Fig. 7.

The letter a represent-s theirame of the machine supporting the bed-plate a'. The

mold-box is formed of two side plates h and of two end plates c, arranged to slide upon the bed-plate. The plates b are movable between the plates c, the latter being of a length to extend along the entire path of plates l). Motion is imparted simultaneously to all the plates h and c, so as to open or close the moldbox, in the following manner:

d CZ are a pair ot' longitudinal shafts supported in frame a and which may be either intergeared or be separately driven by handwheels d or otherwise. Each shaft is provided with a right and a left worm d2, engaged by nuts e' of arms e, to which the end plates c are connected. These arms are providedwith offsets e2, engaging the lower face of bedplate a and constituting guides. Between the worms d2 there are bolted to each of the shafts d a pair of gear-wheels j. These wheels are engaged by racks f', extending transversely to the shafts d.V The racks f are slotted, as at f2, to embrace the hed-plate o and are connected at their upper ends tothe side plates b. The slots f2 constitute guides for the movement of' the racks and side plates.

It is evident that by rotating the shafts dall the four sides of the mold will slide either outward or inward, so that the mold will open or close. Should it be desired to change the size ot' the mold-box, the gear-wheelsfare unbo'lted from shafts d and slipped out of engagement with the racksf. By turning the shafts d the position of the arms e and end plates c may be readily shifted, while by drawing the racks f' in or out and then resetting the wheels f the position of the side plates b may also be shifted. Thus the machine may he readily set to mold larger or smaller blocks. When the size of the moldboX is changed, the same end plates c may be retained, while the side plates in ust obviously be removed and replaced by others of the size desired.

In order to make hollow blocks, I provide a plunger g, carrying a core or set of cores g', corresponding in size and position to the perforations to be formed within the blocks A. The cores g may be projected into the moldbox through pertorations o?, formed in the bed-plate a'. The plunger is operated from a longitudinal shaft g2, having pinions g3, which are engaged by racks g4, depending from plunger g and held against the pinions by idlers 7i.. A pawl and ratchet 't'. maintains the plunger at any elevation, while it is guided in its movements by suitable rails k.

To the inner side of the mold-box are adapted to be removably secured pattern-plates, by which any suitable shape may be given to the ends or face of the block. Thus when the ends are to he made in the form of tongues and grooves I use pattern-plates Z, of the shape illustrated in Figs. and S. So, also, when the face of the block is to be provided with creases to imitate courses of bricks I use the pattern-plate m. (Illustrated in Figs. 5 and 5.) These pattern-plates are so attached to the side and end plates of the mold by bolts it or otherwise that they may be readily removed or replaced.`

In use the mold-box is set to the Vsize required, a false bottom o is inserted, and the IOO core is raised. The stuff is then tainped in and struck off, after which the mold is opened and the block lifted out upon the false bottom.

It will be seen that by my invention blocks of various sizes and contours may be quickly molded by one and the same machine. By sliding the sides outward the pattern-plates are withdrawn from the molded faces of the blocks in a rectilinear direction, so that tongues, grooves, or other deep surface con# igurations may be readily produced.

l. In a machine for molding artificial stone, the combination of a mold-box having sliding sides, and an open bottom, with a verticallymovable core adapted to be projected through said bottom, substantially as specified.

2. In a machine for molding artificial stone, the combination of a mold-box having sliding sides and sliding ends, with a worm-shaft adapted to actuate the sliding ends, and with racks and pinions adapted to actuate the sliding sides, substantially as specified.

3. In a machine for molding artificial stone, the combination of sliding mold-box sides, with sliding mold-box ends which project beyond the mold-box sides, and with means for simultaneously moving the sides and ends, substantially as specified.

4. In a machine for molding artificial stone, the combination of a shaft having right and left worms and a pair of pinions mounted upon the shaft between the worms, with a mold-box having sliding ends adapted to be operated by the worms, and sliding sides adapted to be operated by the pinions, substantially as specified.

5. In a machine for molding artificial stone, the combination of a shaft-having right and left worms, and a pair of pinions movably bolted upon the shaft between the worms, with threaded arms engaging the worms, mold-box ends connected to the arms, racks engaging the pinions, and mold-box sides connected tothe racks, substantially as specified.V

6. In a machine for molding artificial stone, the combination of a mold-box having sliding ends and sliding sides, with worms and pinions for actuating the same, a verticallymovable core, and means for raising and lowering said core, substantially as specified.

7. In a machine for molding artificial stone, the combination of a mold-box having sliding sides and ends, Wit'h pattern-plates adapted to be removably attached to the mold-box, substantially as specified.

8. In a machine for molding artificial stone, the combination of a mold-box having sliding sides and ends, with pattern-plates adapted to be removably attached to the mold-box, and with a core adapted to be projected into the mold-box, substantially as specified.

Signed by me at New York city, county and State of New York, this 27th day of September, 1901.

NOYES F. PALMER.

Witnesses:

F. v. BRIEsEN, EDWARD RAY. 

